I have always been a very big fan of the Sony ULT Tower 9 and the Sony ULT Tower 10. These two speakers have great instrument seperation thanks to their mid range drivers and quad tweeters. However the Sony Tower 9 and Tower 10 are a little big… but now we have the Sony ULT Tower 7… and this is bassicly a mini tower 9 and tower 10, plus it has a built in battery. Now the tower 9 also has a built in battery, but if you’re trying to choose between the Tower 9 and the Tower 7, lets see which one is right for you cause these speakers are fairly different from one another.